With this tab you can show a window different from the current browser window. Click on the image to get Help:

Notice that the name (“identifier”) of the window can’t start with a number and can’t contain spaces or symbols different than numbers or letters. In short “dummy123” “name12” “mickey” are valid identifier, “al$%77”, “&/al”, “mickey,goofy”, “this id”, “3mick” are not.

Please notice also that some “special links” will work only in “read only” mode, and will not work properly while in “editor” mode.